91428918190 has 8 divisors (see below), whose sum is σ = 164572052760. Its totient is φ = 36571567272.

The previous prime is 91428918149. The next prime is 91428918239. The reversal of 91428918190 is 9181982419.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×91428918190² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4571445900 + ... + 4571445919.

It is an arithmetic number, because the mean of its divisors is an integer number (20571506595).

Almost surely, 2^91428918190 is an apocalyptic number.

91428918190 is a deficient number, since it is larger than the sum of its proper divisors (73143134570).

91428918190 is a wasteful number, since it uses less digits than its factorization.

91428918190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9142891826.

The product of its (nonzero) digits is 373248, while the sum is 52.

The spelling of 91428918190 in words is "ninety-one billion, four hundred twenty-eight million, nine hundred eighteen thousand, one hundred ninety".